Are you on Facebook yet? Maybe you should be. I made this pronouncement on my blog recently, encouraging my friends and contacts to join me in leaving LinkedIn behind. Little did I know the ripple effect it would have. Within hours of my posting, several

Pulse’s interface is a lot like Pownce in the sense that it’s a feed of short clips of media from your friends, co-workers, and whoever else you’d like to stalk; you can add comments to anything, too. There’s also an internal Twitter- or Pownce-like featu